REVERSE ENGINEERING OF PLANAR PARTS USING MACHINE VISION
REVERSE ENGINEERING OF PLANAR PARTS USING MACHINE VISION
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DOI：
10.1016/0360-8352(94)90070-1
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发表时间：
1994-04-01
影响因子：
7.9
通讯作者：
MOTAVALLI, S
中科院分区：
文献类型：
--
作者：
HUANG, CN;MOTAVALLI, S
现有产品或原型的设计修改需要从零件表面提取坐标数据，特别是在零件的CAD模型不存在的情况下。在这些逆向工程的情况下，一个自动的CAD模型生成方法可以用来完成的objectives.This本文提出了一个机器视觉系统能够创建一个轮廓CAD图纸的各种平板金属部件的典型在航空航天工业。图像采集过程由数控机床和CCD线阵相机集成完成。零件安装在CNC机床的床身上。摄像头固定在数控机床的主轴上。相机被设置为获取部件的图像，其中相机的视场仅覆盖部件表面的一小部分。通过组合多个图像来扫描零件的完整表面。然后对这些图像进行处理并提取边界轮廓。然后分析和组合提取的边界，以创建扫描零件整个表面的线条图。然后将创建的数据与CAD/CAM系统连接，并从图纸中生成NC代码，以加工零件中的轮廓和钻孔。所开发的算法和系统设置进行了描述，并给出了示例结果。
Design modification of existing products or prototypes requires the extraction of the coordinate data from the part surface, especially in cases where a CAD model of the part does not exist. In these reverse engineering situations, an automated CAD model generation method could be used to accomplish the objective.This paper presents a machine vision system capable of creating a contour CAD drawing for various flat sheet metal components typical in the aerospace industry. The process of image acquisition is accomplished by the integration of a CNC machine and a CCD line scan camera. The part is mounted on the bed of the CNC machine. and the camera is fixed on the spindle of the CNC machine. The camera is set up to acquire an image of the part with the field of view of the camera covering only a small portion of the part surface. The complete surface of the part is scanned by combining several images. These images are then processed and the boundary contours are extracted. The extracted boundaries are then analyzed and combined to create a line drawing of the whole surface of the scanned part. The created data is then interfaced with a CAD/CAM system and the NC code is generated from the drawing to machine the profile and drill holes in the part. The developed algorithms and the system setup are described and sample results are presented.